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Pension and Postretirement Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost (Benefit) The other components of net periodic benefit cost are reflected in other expense (income), net. Components of net periodic benefit cost and other supplemental information for the three and nine months ended September 30, 2023 and 2022 follow:
Benefit Plan Information
Three months ended September 30,
Qualified and Non-qualified Pension BenefitsPostretirement Benefits
United StatesInternational
(Millions)202320222023202220232022
Net periodic benefit cost (benefit)
Operating expense
Service cost $42 $64 $21 $32 $6 $10 
Non-operating expense
Interest cost 166 105 56 32 21 13 
Expected return on plan assets (243)(241)(76)(69)(20)(17)
Amortization of transition asset — 1 —  — 
Amortization of prior service benefit(6)(6) — (7)(8)
Amortization of net actuarial loss 73 106 2 10 2 10 
Total non-operating expense (benefit)(10)(36)(17)(27)(4)(2)
Total net periodic benefit cost (benefit) $32 $28 $4 $$2 $
Nine months ended September 30,
Qualified and Non-qualified Pension BenefitsPostretirement Benefits
United StatesInternational
(Millions)202320222023202220232022
Net periodic benefit cost (benefit)
Operating expense
Service cost $128 $192 $60 $100 $18 $31 
Non-operating expense
Interest cost 497 313 165 96 66 39 
Expected return on plan assets (731)(723)(226)(211)(58)(52)
Amortization of transition asset — 2  — 
Amortization of prior service benefit(18)(18)1 — (23)(24)
Amortization of net actuarial loss 220 318 6 30 6 30 
Settlements, curtailments, special termination benefits and other  —  —  
Total non-operating expense (benefit)(32)(110)(52)(84)(9)(5)
Total net periodic benefit cost (benefit) $96 $82 $8 $16 $9 $26